package serial.utils;

import android.app.Activity;
import android.content.pm.PackageManager;
import android.util.Log;

import androidx.core.app.ActivityCompat;

import java.io.File;
import java.io.FileDescriptor;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

public class SerialPort {
    private static final String TAG = "SerialPort";

    /*
     * Do not remove or rename the field mFd: it is used by native method
     * close();
     */
    public FileDescriptor mFd;
    public FileInputStream mFileInputStream;
    public FileOutputStream mFileOutputStream;

    public SerialPort(
            File device,
            int baudrate,
            int nBits,
            char nEvent,
            int nStop,
            int flags
    ) throws SecurityException, IOException {
        /* Check access permission */
//        if (!device.canRead() || !device.canWrite()) {
//            try {
//                /* Missing read/write permission, trying to chmod the file */
//                Process su;
//                Log.e("666", device.canRead()+"");
//                su = Runtime.getRuntime().exec("/system/xbin/su");
//                String cmd = "chmod 666 " + device.getAbsolutePath() + "\n"
//                        + "exit\n";
//                su.getOutputStream().write(cmd.getBytes());
//                if ((su.waitFor() != 0) || !device.canRead()
//                        || !device.canWrite()) {
//                    throw new SecurityException();
//                }
//            } catch (Exception e) {
//                e.printStackTrace();
//                throw new SecurityException();
//            }
//
//        }

        mFd = open(device.getAbsolutePath(), baudrate, nBits, nEvent, nStop, flags);
        if (mFd == null) {
            Log.e(TAG, "native open returns null");

            throw new IOException();
        }

        mFileInputStream = new FileInputStream(mFd);
        mFileOutputStream = new FileOutputStream(mFd);
    }
    // Getters and setters
    public InputStream getInputStream() {

        return mFileInputStream;
    }

    public OutputStream getOutputStream() {

        return mFileOutputStream;
    }

    // JNI
    private native static FileDescriptor open(
            String path,  //串口路径
            int baudrate,    //波特率
            int nBits,    //数据位
            char nVerify,    //偶校验位
            int nStop,    //停止位
            int flags);

    public native void close();

    public native int sri_Init();

    public native void sri_DeInit();

    public native int sri_IOCTL(int controlcode);

    public native int write(byte[] data);

    public native int read(byte[] buf, int len);

    public native int select(int sec, int usec);

    static {
        System.loadLibrary("serial_port");
    }

}